Apparatus for drying charcoal.



PatHd 11111211911.

R S KEKT APPARATUS FOR DRYIHG GHABCOAL. APPLxcATxoY PILLD 1R 25.1910

We: ef n curses.'

' R, S. KENT, APPARATUS PoR DBYING GHARGOAL.

APPLIOATIDH FILED HAB. 25, 1910.

Patented Feb. 2L i911 2 SHEETS SHEET 2.

Wc'n eases.'

i W www www "UNITED STAEES PENT OFFICE ROBERT KENT, OF BROQKLYN NEW YORK.

.aieeaaa'ros` ron 1in-rizzo CHARCOAL.

To all 'whom 'it 'may concern- Be it ltnown that I, Roiiiaar S. KEXT, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Appaiatus foi- Drying Charcoal, of which the following is a spccitication.

rlhis inention relates to an apparatus for loidrying charcoal, and particularly to an api paratus for drying the :iiiinial charcoal or one-black known as char and used as a decoloriziug agent, especially in the process of refining sugar. v

.5 The preseiitfinventien is an improvement 'i upon those disclosed'iu Patent o. 742,723, granted Qctoher 27th19025, to-George M. Newliall and in Patent No. 871,705, granted .November 19th, 1907, to Robert S'. Kent.

One of the principal features of said Xetrthall patent is the provision of means for passing a current of heated air through a mass or streaiiiof moist char for the purpose of drying the char; but in that patent.

, the heated air does not flow in a substangtiallyA straight line following at all points the shortest path, through the char` but passes first into the char, then into horizontal passages formed between the chai' 8D andthe side wallsof the drier, traverses these passages to the ends of the drier and then passes into chambers communicating `with the stack, the path' through the char being of suoli length that it is ditiicult for $5 the heated air to dry the chai sutliciently.

In said Kent patent the Current of heated ail; is not passed through the char itself, but instead is passed into one or bothl ends of passages lsimilar to those. just referred to in connect-ion with said Newliall patent and abstracts moisture from the wet char by eoii- `tact with the. surface of the char, after which iit passes out between the ends of the drier into the central portion of the drier through ifventilating-openings in the. side-walls down which the char flows, the obieet beiii r to rshorten the distance traversed bv the cur- 3 5rents of heated air iii driers of the type in Specification o Letters Patent.

bodj;v of char, and (2) allowing it to escape as quickly as possible through the surface on which the char is carried--and to produce by this combination a new type of drier differing in construction and inode of operation from both of tlie'in. The niain feature of this -new drier is the provision of means for circulating a gaseous drying medium through a moving body of char substantially iii the direction ofthe smallestv .Patented Fein-21, 1911.'

Appication filed March 25, 1910. Serial No. 551,432. Y i

dimension thereof so that the drying me diam will follow the shortest'course through said char, and will not, after saturation, ie-' inain in contact `with thel char but will es-` cape as soon as it is saturated. In the pre' ferred enibodiiiientof this invention the wet char will Bow down a horizontally-corru-" gated wall or walls of a char drier and forni" with the walls of the rentrant angles of Such corrugatioiis horizontal passages having iii the walls thereof ventilatiiig openings or outlets covering preferably substantially the whole surtace of such walls fro'in` end to end of thel drier, and bj: suitable means a gaseous drying niediuin will he circulated" 'direc-tl)v through the, char substantially 1n the directionof its smallest dimension and out through said veiitilating openings, tie -line of tiow ot' the drying' iiiediui'ii being at. ali points substantially ftransverse tothe char and to the passages formed by the reentrant angles of the drier walls instead of being mainly lengthwise thereof, as in said Nenhal-l .and Kent patents.

ln the drawings accompanying this speci` ticatioii and forming part' of the present application there is illustrated apparatus embodying the main feature just. described and also cei'taiii'siiboidinate features which will be hereinafter described in detail and which are fully set forth in the appended claiins. l

Iiisaid drawings, Figure 1 Ais a vertical section and elevation -of an apparatus for dryingy char embodying this invention; Fig. Q is :iii=eiilarged vertical section of the upper portion of the apparatus or 'char-drier proper, the right-hand side of the view being a central vertical section and the left-hand side being a section in the line 2 2, Fig. 1; and Fin'. 3 is an enlarged section, similar to Fig..1,-of the upper portion of the char.- drier. s

Similar characters designate like parts in all the figures of the drawings.

In carrying the invention into eifect any lil l char-drying apparatus of the general type` disclosed in said Newhall and Kent patents suitable .meal-is may be employed 4for prforining the functions hereinbefore recited, Preferably the Well-known elements of a- 'shown of wellknown construction. Around the lower portions of the retorts 3 is another main element of such an apparatus, to wit, a cooling chamber, such as 4, formed in any well-knowninanner. Y Near. the top of the kiln may also'be located, as is usual, cham- Y bers, such as 5, for the reception of the'dried char until it is passed into the retorts 3 to be revivitied by rta-burning in said retorts.

The chai-drier proper preferably constitutes an upper extension of the outlet for waste products of combustion from the kiln, and is bcst constructed as a casing' through v which such products ot combustion may cir- V- culate back and forth endwise of the drier jnated, by S.

iii a zigzag path from the bottom to the -top of-the same. This char-drier is designated generallyby G. 1t has in this case a relatively high substantially -\'ertica l casing decreasing in cross-sectional area from the bot-'g toni to the top ot' th'e apparatus and of con` siderable. wir th endwise ot' the side-walls but relatively narrow between such sidewalls. n Both ofthese `side-walls are preferably horizontally corrugated to form walls f zigzag in vertical section and havingreentrant angles adapted to form Ventilating passages, as in said patents. The easing of the char-drier-shown here has two' opposing side-walls i having such horizontal corrugations forming reintrant angles and two straiglit vertical end-walls, which are desig- 'llle wet charshown in the drawiiigs in descending a side-wall of this` Y. zigzag construction forms with the rentrant portions 'of the easing horizontal passages. such as 9, the areas of which are'deterniined by the angles of the side walls ot' the corrugations and by the tlow-line of the wet or partially dried char. There' will usually be combined with such a side-wall or sidewalls 4suitable means for forming therewith a passage or passages for permitting the descent of a zigzag stream or streams of ,cha r. These parts -are so foi-pied and disposed that. 'the stream of char desccnding'between the co- I operating surfaces is a `comparatively7 thin one, though ,of great widt`t1.` The means emiployed for forming such azigzag stream or 4strezini'siof descending char aire or .may be the same as heretofore used, that is, they may be 911e or more series of plates, such as 0.5 .10, secured to suitable vsupports 11, at the estasi Y vbulk the moist char. In the drawings two i hoppers are shownv asl formed by diverging by plates, such as 12, secured to the supports 11. All of these features are common i to the two driers disclosed in said Newhall and Kent patents. In addition to the aforethere arepreferably employed certain features disclosedon'l in said Newhall patent, and also certain oti er features disclosed only Ain said Kent patent. For the purpose of moving bodies or streams o wet char a cor.- -struction isA employed preferably substantially like that disclosed in .said` Newhall patent. Thus in the construction shown l walls and zigzag plates Tand 11 islinclosed by aprons or cover-plates, such as 13,l properly secured to the end-walls of the casing.` which serve to keep the drying medium cirzigzag walls.. The bottoms of the zigzagV passugeways formed between these plates and"said walls may be closed or suitably controlled to shut otl' or permit the tlow of ways and at each side of the drier. chainbers, such as 15, are preferably formed by means of curved plates. such Aas 1li. which extend,

plates 13 to the outside walls li' ofthe chain-` bers 5, and by means of plates` sucli as 1S, which extend from the walls 1T to the valves c ambeis by means of spacing pieces or braces 19, andthe plate 1G forming the outerwall ot' each chamber preferably has 'openings 30 therein through which access may be had to thevalves or gates ll. openings may be closed by sliding doors or cori-is. such as 2l. The chambers` 15 formed by those parts at opposite sides of the drier will rct'erably communicate with the coob being shown `at 2;! leading from said-cooling;-` chamber and connecting al', their upper ends with the chambers 15. These pipes-serve to carry the air heated by the retorts in' the over the zigzag side-walls ofthe drier. The .lowermost portions of the chambers formed by the plates 16 and i8 are slip orted in such a manner, preferably omit 1e upper they may be tilted back when itis' necessary ,to-.remove any'of theretorts, they being hinged to said side-Walls for this pui-pose. In order to do this. thepipes .22 may have slipconnections with the chambers-15 for lm;

upper ends-of -which may be formedthe i usual hopper or hoppers for receiving in upper portions of the side-w .ills of the drier an said parts commonto both of driers supplying the gaseous drying medium to the B0 herein the char descending the corrugated 35` culating between the inclined plates andthe char bynneans of valves or gates, such `as 95 A 1l. At the bottoms of these zigzag passageg from the lower edges of the aprons or coreror sliding gates Il.: These pai-ls are `suitably spaced apart and supported to form. the

These ing c ianiber 4 surrounding the retorts. pipes 115' coolingchamber to the char as it, flows down edges of thewalls 17 of the chamtftfs 5, that 125 types' ot' driers shown in .said Newhall and lwith the ot-Zfrr parts to permit the tilting or -tilating openings or in the present construoti n in addition to 'a nature that substantially the whole surv 1 rangement of these openings heilig such as the area of each 'stream of char, the drying medium thus following the shortest course the* arnese, of permitting quick connection t 'or -oizncction of the same, or may be shown as placed at points substantially inin anv suitable wa ireferahl as indicated other iso 's itahly constructed or combined swinging of the lower portions of said chnmhers ,15. Su-itablevalves or dempers, such as 23,v will usually be placed 'at convenient points inthe pipes 22 to control the How of .heated `air from the cooling chamber 4. .All of these parts are or may be substantially like those disclosed in said Newhnll patent. ln addition toA said parts of the Newhall drier certain features found only in the said lient patent may also be employed. The principal vone of these is the use of venoutlets through the side-walls 7 of the`drier. In said Kent patent these Ventilating.openings or'outletsare terinediate of the end-walls of the drier, but

such intermediate openings, other .openings or outlets are provided, preft'ably of such face of each of the side Walls 7 is filled in aY horizontal direction with Ventilating openings from end to cud oftlieidrii-the arto permit the dryinflr medium to pass through the char and out through said openings in substantially a straight line at all points in :substantially straight through the char at all points inthe area thereof. Said ventilating outlets or openings may be formed at 2l, in the upper or horizontal Wall ofv each rentrant angle, the drying medium saturated with the moisture, etc., abstracted rom the char passing directly'through these openings or outlets into the interior of the drierk and thence through an opening 25 in an end-wall 'if thc drier directly to the stack.

lt will he noticed that in this improved type of char-dricr the chambers 15 extend from end to end of the drier, and, unlike the lient patents, there are vno chambers at the ends ot' said drier for any purpose. The' ieated air employed herein as the drying medium is taken, as before indicated, from the cooling chamber 4 and is drawn or forced either by natural or forced draft through the chambers l5 and substantially straight through the, lescending streams of char, passing through said streams of char and` through the openings or outlets 2% in a subslanrially horizontal path following the ,shortest course through said char, the means employed being anyI suitable for the purpose, such tor-cxampi as that disclosed in said Kent patent.. In the interior of the char-drier all of the saturated streams of air emerging from the outlets 2l mingle l' aforesaid patents, a series oi' partitions, such;

as 26, disposed substantially horizontally in the casing and having openings their opposite' ends alternately`-` as in said patents foi-.the purposeof prolonging the time occupied by thefwaste products in passing over the inner surfaces of the side-walls 7 out of contact with the'char:l these oartitieus formirge zigzag path for all of the waste .products (including both the products of combustion and the moisture-laden dryingniedium before referred to). In the passage of the waste prMucts of combustion through this zigzag path their full heating and drying effect is utilized. Y Y Y 1 What I claim is:

1. In an apparatus for drying charcoal, the combination with a substantially vertical wall for receiving a downwardly tiowing, body of char said Wall having ventilating openings therethrough substantially throughout its whole area, of a lziln, means for circulating the' hot products of combustion from the kiln in contact. with one side of said wall and out of Contact with the char atJ the other side of such wall, and means for circulating heated air through-said body of char substantially' in the direction of the smallest, dimension thereof and outJ in the Same. direction through said Ventilating openings. l Y

2. In an apparatus for drying charcoal, the combination with a horizontally-corrugated wall for receiifinfr a downwardly' flowing body of char sai wall having ventilating openings therethrough substantially throughout its whole area, of a kiln, means for circulating,r thehot products of combustion from the ltiln in contact with one side of said wall and out of Contact with the char at the other side of such wail, and means for circulating heated air through said body of char substantially in the direction of the smallest dimension thereof and out .in the same direction through said Ventilating openings.

3. In an apparatus for drying charcoal, the combination with a casing having a pair of opposed substantially vertical walls for receiving two downwardly flowing streams of -ehar each ofsaid walls having ventilating openings 'therethrough substantially throughout its whole area, of a kiln, means for circulating the hotl products of combustion through the kiln in contact with the inner sides of both of said walls but out of contact with the char at the outer sidesof such walls, and means for circulating heated air .mension of each stream and out. in the saine' direction rthrough said Ventilating openings.

A 4. In an` apparatus for drying charcoal,-

the combination with a pair of opposed horizontally .corrugated walls each formingv rentrant angles the walls of which have a multiplicity of Ventilatingoutlets therethrough covering substantial.; their whole areas and form 'Wit-ht'wo downwardly flowing streams of char two series of horizontal passagesof a kiln', means for circulating the et products of combustion through the kiln jn contact with the inner-sides of bath of said walls but outof'cont'act with the char at the outer sides of such Walls, and means for circulating heated air through each of said streams of char substantially in the direction of the smallest dimension of each stream and out in the same direction through the Ventilating outlets of eachhorizontal y-corrugated Wall. i

5.In an apparatus fordrying charcoal, the coinbiuation with a casing having a pair of opposed horizontally -corrugatedside walls each forming rentrant angles, the Walls Aof which have a multiplicity of ventilating outlets therethrough covering substantially their Whole areas and form with t-'wo'downwardly fiowing streams of char tivo series of horizontal passages, of a kiln, means for circulating the hot products of wmbustion from the kiln through said.cas

said streams of char substantially in the dithrough the x-'entilating outlets of each horizontally corrugated wall into the interior of said casing.' y

6. In an apparatus for drying charcoai,`

walls and a pair of opposedA horizontallycorrugated side walls for receiving two downwardly-flowing streams of char 'of the full Width of said sidewalls each of said side-walls having Ventilating openings theref `through substantially throughout its Whole area, of a kiln, means .tor circulating the hot products of combustion through the kiln in Laura E. SMITH R. Cgaiirloiv.

the combination with a casing having ending out of contact with the char, and means for circulating heated air through each ofA rection of the smallest dimension of eachf stream and out in the same direction l contact with the inner sides of both of'said 

